Improvement in pitmen



R. H. KEER.

Pitman. n

Patented March 3. 1874a Mg@ WITNEssEs MLMBAZZL INVENToR UNITED STATES PATENT OFFICEc ROBERT H. KERR, OF RICHMOND, OHIO.

IMPRovEMENT iN PrrMr-:Ne

Specification forming part of Letters Patent No. 148,124, dated March 3, 1874; application tiled February 13, 1874.

purpose of enabling the blocks C C' to be inserted, as hereinafter described. The blocks C C' are formed with recesses o c1 in their upper and lower edges, corresponding in shape with the guides b b1, a portion of each block on its under side being cut away at c2 to facilitate its insertion into the recess B1. The blocks O O' are inserted into the recess B1 by first placing them in`position, as shown by dotted lines c c1 in Fig. 2, and afterward pushing them inward, when they will assume a vertical position, as shown by Fig. l, the block C being inserted first, and' afterward the block C'. The blocks are then held in position by a retaining-screw, B2, working in a screw thread formed in the rear of the head B. The rectangular block E is forged or cast in one piece, and is provided with a rectangular recess, E', which is provided with ilattened V- shaped guides e e1, constructed similarly to the guides b b1, which are received into corre- To all 'whom it may concern: p

Be it known that I, ROBERT H. KEER, of Richmond, in 'the' county of J eit'erson and State of Ohio, have invented certain new and useful Improvements in Pitman Attachments; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings, which form part of this specification.

My invention relates to improvements in the arrangement and construction of the pitmanconnection of reaping and mowing machines, whereby the same are rendered less liable to wear, and when worn are more easily adjusted than heretofore.

In the accompanying drawings, which form part of this specification, Figure l represents a side view, partly in section; and Figs. 2, 3, 4, 5, 6, 7, and 8, detail views of parts of a pitman-connection constructed according to my invention.

In each of the views similar letters of reference are employed to indicate corresponding parts.

A represents the knife-heel of a mower or reaper, which is provided with a head, B, in which is formed a rectangular opening, B', for thereception ot' a pair of bearing blocks or brasses, C C', which are bored out to receive a projecting pin, d, extendingfrom one end of the pitman-shaft D, the opposite end of which is retained by means of its head d' in a bearing, e3, in the end of a rectangular block, E which is formed to receive the bearing-blocks F F', which are bored out at f to receive a pin or stud supported and carried eccentrically by a plate or crank arm aiiixed to a drivin g-shaft ofthe apparatus, as is well understood. The head B is formed in one piece, and the upper and lower faces of the metal forming the rectangular opening B1, are so constructed as to form flattened V-shaped guides b b1, the apex '12 of each guide being formed nearer to thel side b3 than to the side b4 of the head B, but exactly over one another. The guidel b extends '.he whole width of the opening B1, while the guide b1 only extends partially across, being :nt away at b5, as shown by Fig. 2, for the F F'. The block F is formed narrower than the block F', and of a width to allow of its easy insertion into the recess E'. It is also provided with an extension or bearing, f2, which rests against and holds the head d' of the pit man-shaft in proper position, while the block F' is rectangular in itsl form, and is provided with a notch or recess in its under side at f3, to enable its lower front edge to clear the end of the guide c1, which is out away at c2, in order to allow the rear end of the block F' to pass into position. G is a retaining-screw for holding the blocks F F' in position. The stud or pin d is formed in a separate piece from the rod D1 of the pitman-shaft D, and is inserted in the end of the rod Dl, after the end of such rod has been pushed through the bearing e3 in the rectangular block E. e2 is a recess in the opposite end'of the block E to facilitate the insertion of the rod D', and allow of the passage ofthe head d' thereof. After the rod D1 has been inserted, as described, the stud d is affixed in position by screwing or riveting its shank into a recess, D2, in the end of the rod D'. The pitman-shaft having been thus placed in position, the blocks F F' are then inserted, and the pitman-connection is complete.

By this means I am not only enabled to pro= duce a novel arrangement and construction of spondingly-formed recesses f f1, in the blocks menige pitman-connection for reaping and mowing machines, Which is much stronger and less liable to Wear than those now in use, and when the bearings of the blocks are worn they may be readily adjusted by means of the retaining-screws, but I am also enabled, by inserting the blocks, as described, to dispense with the retaining plates and screws, Which are required in other arrangements Where blocks or brasses such as described are employed.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

l. In combination with the knife-heel of a mowing or reaping machine having a head, B, and guides b b1, constructed as described, the blocks or brasses C C and retaining-screwsT B2, constructed substantially as and for the purpose shown and described.

2. A pitmanshaft, D, having a rod, D1, stud d, and rectangular head d', constructed and operating as shown and described.

3. The combination, with the block E, of a pitman-shaft having a rectangular recess, E', and guides e el, constructed as described, the blocks or brasses F F', constructed substantially as set forth.

4. The combination With a knife-heel having a head, B, and blocks or brasses b b1, con-. structed substantially as described, the pitman-shaft D, having a stud, d, rod D1, and rectangular head d,b1oek E and blocks or brasses F F, constructed and operating substantially as shown and described.

In testimony that I claim the foregoing I have hereunto set my hand this 10th day of February, 1874.

ROBERT H. KEER.

Witnesses:

J osnPH SWAN, J AMES BLUE. 

